Electrolyte sheet with regions of different compositions and fuel cell device including such
First Claim
1. An electrolyte sheet comprising two major surfaces, said electrolyte sheet having regions of differing compositions, so that (i) at least one of said regions has at least 1.5 times higher ionic conductivity than at least one other region;
- (ii) wherein said at least one other region has 20% more tetragonal phase zirconia per volume than said at least one region with higher ionic conductivity; and
(iii) when viewed in cross-section taken through said major surfaces at least one of said regions exhibits a non-uniform thickness.
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Abstract
An electrolyte sheet comprising two major surfaces, the electrolyte sheet including regions of differing compositions, so that (i) at least one of these regions has at least 1.5 times higher ionic conductivity than at least one other region; (ii) wherein the at least one other region has 20% more tetragonal phase zirconia per volume than the least one region with higher ionic conductivity; and (iii) when viewed in cross-section taken through said major surfaces at least one of the regions exhibits a non-uniform thickness.
43 Citations
21 Claims
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1. An electrolyte sheet comprising two major surfaces, said electrolyte sheet having regions of differing compositions, so that (i) at least one of said regions has at least 1.5 times higher ionic conductivity than at least one other region;
- (ii) wherein said at least one other region has 20% more tetragonal phase zirconia per volume than said at least one region with higher ionic conductivity; and
(iii) when viewed in cross-section taken through said major surfaces at least one of said regions exhibits a non-uniform thickness. - View Dependent Claims (2, 3, 4, 5, 6, 20)
- (ii) wherein said at least one other region has 20% more tetragonal phase zirconia per volume than said at least one region with higher ionic conductivity; and
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7. An electrolyte sheet comprising two major surfaces, said electrolyte sheet having regions of differing compositions, so that (i) at least one of said regions has at least 1.5×
- higher ionic conductivity than at least one other region;
(ii) the least one other region has higher strength than said at least one of said regions with higher ionic conductivity, wherein said at least one other region with higher strength has 20% more tetragonal phase zirconia per volume than said at least one region with higher ionic conductivity; and
(iii) when viewed in cross-section taken through said major surfaces at least one of said regions exhibits a non-uniform thickness. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21)
- higher ionic conductivity than at least one other region;
Specification